Essay on math work

As 91264 (v1) AS 2.9
Introduction - I have chosen to investigate who sends the most amount of text messages in a day between parents and students, from the sample data taken from the 2009 cell phone data sheet. I have used a random sampling method ‘Ran # + 1’, which will give me an unbiased sample space. I predict that students will send more texts messages in a day.
Comments on DATA.
Shape
Parents- the shape for the parents text messages per day is tightly bunched with an unusual extreme figure. (90) This unusual extreme is possibly because she is a young parent that is social.
Students- The shape for students text messages per day is spread more evenly over the range – This is possibly because the students are similar age and at a social age.
Overlap- There is no overlap in the middle 50%, but, the UQ of the parents text messages has the same value as the LQ text messages for the students (5.5).
Confidence Interval
Parents- 3.25< 2 < 7.25
Students- 4.25< 10 < 24.25
If I was to pick another 30 random samples the median for the parents text messages per day would be between 3.25 < 7.25. This is a small range which shows that the amount of text sent per day is a small number.
If I was to pick another 30 random samples the median for the students text messages per day would be between 4.25 < 24.25. This is a large range which shows that the students text message data is spread out more, with more texts being sent overall.
Spread – The middle 50% text messages…

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IB Math Studies Rough Draft
Criterion A
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Chockla
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